From 42174235ba6a7cfac8243a4c2aedb1271a4659fe Mon Sep 17 00:00:00 2001 From: Wisley Chen Date: Mon, 9 Dec 2019 19:14:13 +0800 Subject: mb/goog/hatch/var/dratini: Tune i2c frequency to 400 KHz Tuning i2c frequency for dratini: I2C0: 396 KHz I2C1: 398 KHz I2C3: unused I2C4: 394 KHz BUG=b:145891557 BRANCH=hatch TEST=emerge-hatch coreboot chromeos-bootimage Change-Id: I1431554fbce5f3ce113ef1a934e39448e7ba321c Signed-off-by: Wisley Chen Reviewed-on: https://review.coreboot.org/c/coreboot/+/37605 Reviewed-by: Paul Fagerburg Reviewed-by: Tim Wawrzynczak Tested-by: build bot (Jenkins) --- src/mainboard/google/hatch/variants/dratini/overridetree.cb | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'src/mainboard') diff --git a/src/mainboard/google/hatch/variants/dratini/overridetree.cb b/src/mainboard/google/hatch/variants/dratini/overridetree.cb index 28b18b8b7f..564a14d93c 100644 --- a/src/mainboard/google/hatch/variants/dratini/overridetree.cb +++ b/src/mainboard/google/hatch/variants/dratini/overridetree.cb @@ -35,15 +35,18 @@ chip soc/intel/cannonlake }, .i2c[0] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 50, + .fall_time_ns = 15, }, .i2c[1] = { .speed = I2C_SPEED_FAST, - }, - .i2c[3] = { - .speed = I2C_SPEED_FAST, + .rise_time_ns = 60, + .fall_time_ns = 25, }, .i2c[4] = { .speed = I2C_SPEED_FAST, + .rise_time_ns = 60, + .fall_time_ns = 60, }, }" -- cgit v1.2.3